Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2d241092554d0f…

MALICIOUS

PDF

88.8 KB Created: 2021-07-27 17:18:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5779aa51c194d46068f64f052a5c26a0 SHA-1: 100a73a0216743f46ca3737681b844f6b1ed34c7 SHA-256: fe2d241092554d0f3fce886a159fa48fc760d58c8f18f832c7f571df314dc1e6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of links pointing to various compromised websites, indicating a link farm designed to redirect users. The ML classifier strongly flagged this PDF as malicious. The presence of multiple compromised CMS upload links suggests a pattern of hosting malicious content on legitimate but compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://aeternoplanning.com/ckfinder/userfiles/files/6272360962.pdf In PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/oopiol5gik12sm1nujdfgdum2v/33990241564.pdfIn PDF document text
    • http://hondatayho.vn/images/ckeditor/files/22017296884.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/d06e268e655addc57c4f7cfbdaa7701a/xevobasajagidofawobuvi.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6daed95971---bitutewowu.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/160acf358c1b49---56247688007.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/14381364382.pdfIn PDF document text
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3fde75f022---10914761326.pdfIn PDF document text
    • https://fairtradeportal.pl/userfiles/file/65672578512.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/pufumalu.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/zojijewosejajosaxodik.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1d15d626e---28808705056.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/vawadobuge.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/86442650470.pdfIn PDF document text
    • https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/e52f3544d699d8c492d6cc8a1d497cef/fegokixije.pdfIn PDF document text
    • https://bienenaktuell.com/sites/bienenaktuell.com/files/file/mubupidudatalubomoguwa.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160da274d3492e---wasexudedobawupu.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/8dr88fuv20du00tp0dkiutpiq0/lelelekavarizomesowalur.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/k31289be0opl412jeotjhb4rdr/1293316946.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/k51tiiqaovicdbuq5b716lftkm/niledonuwakojuliko.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/fegetokutupepapitat.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16072d8590afa0---64341507927.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=bloodline+guide+pathfinderPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF87F 10760 bytes
SHA-256: 7a18d80d838fefc8d48dddd7daef7436d538a3071382d561e2b82fe5e1a2c2ed
font_01_sfnt_off000110ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EE 17068 bytes
SHA-256: 093aba79d679b4f86f0e553f6421332d46194f26956d3d23ca18b53193be1cdf
font_02_sfnt_off00013cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CFF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1